Emmannuelle Prévert (Suzanne Danielle) relieves the boredom of a flight on Concorde by seducing timid Theodore Valentine (Larry Dann). She returns home to London to surprise her husband, the French ambassador, Émile Prevert (Kenneth Williams) but first surprises the butler, Lyons (Jack Douglas (actor)). He removes her coat, only to find that she has left her dress on the aircraft. The chauffeur, Leyland (Kenneth Connor), housekeeper, Mrs Dangle (Joan Sims), and aged boot-boy, Richmond (Peter Butterworth), sense saucy times ahead… and they are right! Émile is dedicated to his bodybuilding, leaving a sexually frustrated Emmannuelle to find pleasure with everyone from the Lord Chief Justice (Llewellyn Rees) to chat show host, Harold Hump (Henry McGee). Theodore is spurned by Emmannuelle, who has genuinely forgotten their airborne encounter, and, despite reassurances from his mother (Beryl Reid), exacts revenge by revealing Emmannuelle's antics to the press. However, after a visit to her doctor (Albert Moses), she discovers that she is pregnant and decides to settle down to a faithful marriage with Émile… and dozens of children.